Warren Screw Products, Inc. Precision Turned, Machine Products, Assemblies, Machining, Metal Components, CNC, screw manufacturing, Broaching, Machined Components, Assembled Components, turned Components Warren Screw Products, Inc. is a manufacturer of Close-Tolerance Turned, Broach, Machined and Assembled Metal Components. Since 1957, we have been machining customer designed components for all major manufacturing industries, Automotive, Appliance, Commercial, Heavy Truck, Agriculture and Military.